Electric-railway trolley



(No Model.)

R. N. DYER. ELECTRIC RAILWAY TROLLEY. No. 567,307. Patented Sept. 8,1896.

UNITED STATES Pnrn wr OFFICE.

RICHARD N. DYER, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO THE GENERALELECTRIC COMPANY, OF NEW YORK.

ELECTRIC-RAILWAY TROLLEY.

SPECIFICATION forming part of 2 Letters Patent No. 567,307, dated.September 8, 1896.

Application filed April 30, 1896. Serial No. 5 89,640. (No model.)

To all whom it may concern.-

Be it known that I, RICHARD N. DYER, a citizen of the United States,residing at East Orange, in the county of Essex and State of New Jersey,have invented a certain new and useful Improvement in Electric-RailwayTrolleys, (Case 13,) of which the following is a specification.

It is well known that in the practical working of electric-railway carswherein the current is supplied by an under running trolley from anoverhead working conductor a great range of adjustment of the trolleyisrequired, the overhead working conductor being at some points, as inpassing under bridges, lowered close to the roof of the car and at otherpoints being elevated to a height of ten feet or more above thecar-roof. By reason of this great range of adjustment it becomesdesirable to produce means for maintaining the upward pressure upon thetrolley which will give a practically uniform pressure throughout theentire range of adjustment of the trolley, anend which has heretoforebeen imperfectly accomplished.

In carrying out my invention I produce the upward pressure upon thetrolley by means of an electrodynamic motor whose torque or pull isuniform and independent of the adjustment of the trolley. This motor ispreferably connected with the trolley by a speedreducing gearing of anysuitable character, so as to enable a small motor to do the work. Theinitial upward movement of the trolley to secure a suflicientpreliminary contact for setting the small motor into action may besecured in any suitable way, as by overbalancing the trolley by aweight, or otherwise. The trolley-raising motor is also preferablylocated in a circuit independent of the car motor or motors, so that itsoperation will not be affected by the operation and regulation of thecar-motors.

In the accompanying drawings, Figure 1 is a view, principally indiagram, illustrating an arrangement embodying my invention; and Figs. 2and 3 are views of other forms of gearing connecting the trolley-poleand lifting electric motor.

than the drum E, the two drums being connected by a cord 0, whereby therotary effort exerted by the motor will be utilized to produce an upwardpressure of the trolley.

The car-motors are located in the circuit 1 between the trolley and thecar-wheels, while the trolley-lifting motor is located in another andindependent circuit 2. The circuit 2 may include lamps or otherresistance H, or the motor F may be wound for the entire pressure of thecircuit. A weight at maybe used to overbalance the trolley-pole andproduce the initial contact with the conductor A. The pulling-cord forthe trolley-pole is shown at 6.

Instead of the speed-reducing gearing consisting of the drums and cord,a pinion and gear-wheel may be used for connecting the trolley andlifting-motor, as shown in Fig. 2, or, to bring the trolley-pole pivotand the shaft of the motor F in line, a form of gearing such as thatshown in Fig. 3 may be employed.

It will be observed that the torque or pull of the trolley-lifting motoris the same throughout the entire range of movement of the trolley.

The invention of lifting the trolley by an electrically-operated devicelocated in a circuit independent of that of the car-motors is notclaimed herein, the same being reserved for a separate application. forpatent, (Serial No. 589,630, filed April 30,1896.)

hat I claim is- 1. In electric railways, the combination with anupward-pressure trolley, of an electrodynamic motor connected with thetrolley and V acting to lift the same with a torque or pull.

which is constant and uniform throughout the entire range of adjustmentof the trolley, substantially as set forth.

2. In electric railways, the combination with an upward-pressure"trolleyand the car motor or motors, of an electrodynamic motor a speed-reducinggearing connecting the 1110- connected With the trolley and acting tolift tor and trolley, substantially as set forth. 10

the same, said trolley-lifting motor being lo- This specification signedand witnessed this cated in a circuit independent of the car-mo- 25thday of April, 1896. 5 tors, substantially as set forth. RICHARD N. DYER.

3. In electric railways, the combination WVitnesses: With anupward-pressure trolley, of an elec- EUGENE OONRAN,

trodynamic motor for lifting the trolley and JOHN R. TAYLOR.

